Magnetic chip collector for grinders



April 17, 1951 :VL; SANDLIN MAGNETIC, can COLLECTOR FOR c mn s ruedna'v. 10, 1947 Alfred V. Sand/in I INVENTOR.

Patented Apr. 17, 951

UNITED STATE s' PATENT FF-me; 1

MAGNE TIC CHIP COLLECTOR FOR I Alfred v. sahali'n,oor u ohri tigre lApplication November 10, 1947, Serial-N0. 785,105

2 Claims. (01; 51-270) 1 This invention relates to new and usefulimprovements and structural refinements in electric grinders, and theprincipal object of the invention is to provide an attachment for suchgrinders in the form of what may be referred to as a magnetic chipcollector, whereby particles 'of iron and steel which usually fly fromthe attached to grinders of various types and sizes.

An additional object of the invention is to provide a magnetic chipcollector for grinders which will readily lend itself to economicalmanufacture, and which is otherwise well adapted for the purpose forwhich it is intended.

With the above more important objects in view, and such other objects asmay become apparent as this specification proceeds, the inventionconsists essentially of the arrangement and construction of parts asillustrated in the accompanying drawings, in which:

Figure 1 is a front elevational view of a grinder showing the inventionin situ thereon.

Figure 2 is a top plan view of the subject shown in Figure 1, the samebeing partially broken away to reveal the invention, and

Figure 3 is a cross-sectional view, taken substantially in the plane ofthe line 3-3 of Fi ure 1.

Like characters of reference are used to'designate like parts in thespecification and throughout the several views. r

Referring now to the accompanying drawings in detail, the generalreference character [0 designates a grinder of conventional design,which embodies in its construction a suitable electric motor ll mountedupon a base l2, the armature [3 of the motor carrying a grinding wheel[4, as will be clearly apparent.

The wheel I4 is partially enclosed by means of a safety guard l5 which,in many instances, is associated with the motor ll through the medium ofthe connecting sleeve l6, and the essence of novelty in the inventionresides in the provision of a magnetic chip collector designated 1 2generally by the reference character 11, which will be presentlydescribed.

The chip collector l1 embodies in its construction an arcuate member or.trough l8 having a V-shaped cross-sectional configuration as shown inFigure 2, the member 18 being provided at one end with a bracket l9whereby it is secured 'to one end of an arcuate electro-magnetic coil20.

The entire collector I1 is disposed within the guard I5 to which it issecured by means of 'a suitable bolt or screw 21, matters being soarranged that the arcuate member I8 is disposed adjacent the peripheryof the wheel It, as is best illustrated in Figure 3.

The electro-magnetic coil 20 is connected in I parallel by means of atwin conductor 22 to a switch 23 which controls the operation of themotor ll, so that the electro-magnetic coil is energized simultaneouslywith the motor I I when the grinder is to be used.

As will be clearly apparent, the switch 23 is conveniently mountedwithin the base l2.

When the invention is placed in use, supply of current is simultaneouslydelivered to the motor H and to the coil 20, resulting in the rotationof the wheel l4 and in simultaneous magnetization of the member 18.-Accordingly, when a steel or iron object is being ground on the wheell4, particles of iron or steel'will be attracted by the member l8 andthereby prevented from flying beyond the guard I5 and possibly injuringthe operator. After the supply of current to the motor H and to the coil20 is discontinued, the coil as well as the member 3 will becomedemagnetized, and any particleswhich have gathered on the member l8 willsimply drop downwardly to the floor through an outlet duct 24. Thisoutlet duct may simply assume the form of a pipe or tube secured to thelower portion of the guard I5, as indicated in Figure 3.

Needless to say, when the motor I! is used in association with toolgrinding wheels, two of the collectors l1 and two outlet ducts 24 shouldbe used, as exemplified in the accompanying drawings.

It is believed that the advantages and use of ried by said magnet andhaving magnetizable chip collecting surfaces disposed in V'-shaped'formation adjacent the periphery of said wheel;

whereby metallic chips projected by said grind- 15 Number ing wheel intosaid guard may be attracted by said magnet and collectedi'n said.trough;

4 2. The device as defined in claim 1 wherein said guard includes adownwardly extending chip outlet duct, said magnet being demagnetizableand being disposed above said duct to gravitationally discharge chipsthrough said duct upon demagnetization of said magnet,

ALFRED V. SANDLIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Name Date 1,007.2'72 Crease Oct. 31, 19112,423,287- Beisel July 1, 1947

